CoCas9是一种来自人类微生物组的紧核酶,用于高效和精确的基因组编辑
Eleonora Pedrazzoli1, Michele Demozzi1, Elisabetta Visentin1
1Department of Computational, Cellular and Integrative Biology (CIBIO), University of Trento, 38123, Trento, Italy.
Nature communications
|April 24, 2024
概括
科学家们从人类微生物组中发现了CoCas9,一个较小,高度活跃的CRISPR-Cas9核酶. 这种新工具推进了基因疾病治疗的基因编辑,并成功地用于小鼠的体内编辑.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 生物技术是生物技术.
背景情况:
- 在基因编辑方面,CRISPR-Cas系统至关重要.
- 扩大CRISPR-Cas工具箱对于开发遗传疾病疗法至关重要.
- 需要新 Cas 核酶来增强基因组编辑能力.
研究的目的:
- 为了从元基因组组装基因组中发现新的CRISPR-Cas核酶.
- 描述一种新的,更小,更高效的Cas9核酶,命名为CoCas9.9.
- 评估CoCas9在基因编辑应用中的体内疗效.
主要方法:
- 对II型CRISPR-Cas loci.进行大基因组组装基因组 (n=17,173) 的大量存储库的选.
- 从未培养的柯林塞拉物种中分离和描述CoCas9核酶.
- 在体内研究中,使用腺相关病毒 (AAV) 载体同时输送CoCas9和单导向RNA (sgRNA).
主要成果:
- 鉴定了17173个不同的II型CRISPR-Cas位点.
- 发现和描述CoCas9,一个高保真核酶 (1004个氨基酸),具有高活性和低分子大小.
- 在小鼠视网膜中使用AAV传递的CoCas9和sgRNA进行有效的体内基因组编辑.
结论:
- 这项研究显著扩大了可用于基因组编辑的Cas9核酶库.
- CoCas9代表了一种有前途的,紧的,高效的基因疗法开发工具.
- 这些发现有助于推进基因疾病的基于CRISPR-Cas的治疗策略.
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